How do you solve 3x+9y=-7

What is the missing step in this proof ?

The liabilities of cullumber are $99,000. owner’s capital is $143,000; drawings are $96,000; revenues, $467,000; and expenses, $301,000. what is the amount of cullumber company’s total assists?

Combine the information in the problem and the chart using the average balance method to solve the problem.